Add a concept of FontFamilies & Collections

[feliwir]

Hey, i wanted to give some ideas to make the library easier to use and usable without having to add font files at all:

• Allow loading of system fonts
• Allow loading fonts by their family name
• Allow font substitions

It might be worth considering to switch to https://github.com/SixLabors/Fonts , since it allows loading of system fonts and has a concept of families & collections. So you can just do stuff like this:

FontFamily arial = SystemFonts.Find("Arial");
Font font = new Font(arial, 1f, FontStyle.Regular);

[drjaydenm]

I really like the idea of being able to load system fonts and the font library you linked to looks pretty good, I'll take a look over it and see how I can integrate it.

What particular features with font families would you be looking for? A thought that comes to mind is some sort of simple markdown-style language where the library can automatically convert to regular/bold/italic within a string of text if the correct font weights are present in a family. Is this the sort of stuff you have in mind?

[feliwir]

@drjaydenm the thing i'd be looking for with font families is loading of fonts just by defining their description/family. E.g. font-family: Verdana, "Lucida Sans Unicode", sans-serif would try to load exactly that font. The benefit of this approach would be that a substitution could be loaded if the requested font is not available.

Regarding SixLabors.Fonts: I did a PR a while ago which exposes the Glyph data: https://github.com/SixLabors/Fonts/pull/102/files So i guess that library could be used as a replacement for Typography (also considering that library has a NuGet and is maybe a little bit more stable)